Machine for forming pu lp cylinders



(No Model.) y

' W. P. STEVENS.

MACHINE FOR FORMING PULP GYLINDERS. No. 375,839. y I Patented Jan. 3, 1888.

UNITED STATES WILLIAM P. STEVENS,

PATENT OFFICE.

OF DEERING, MAINE.

MACHINE FOR FOR'IVIING PULP CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 375,839, dated January 3,1888.

Applicatibn filed February 2, 1 887. Serial No. 5226.297. (No model.)

To all whom it may concern,.-

Be it known that I, WILLIAM P. STEvEivs, a citizen of the United States, residing at Deering, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Machines for Forming Pulp Cylinders; and I do hereby declare the following t-o be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to machines for forming hollow cylindrcalarticles from pulp by the employment of centrifugal force; and it consists, substantially, in the use of a pervious cylindrical former running horizontally and having two or more bearings, whereby dangerous oscillations are prevented and the cylinder placed in a position to be easily manipulated. Heretofore in this class of machines,where rapidly-revolving cylindrical formers have been employed in forming pulp articles, the former has been placed in a vertical position upon a revolving base, its upper end being free and the base being its only support. It has been found in these machines to be a very difficult matter to preventthe cylinders from oscillating badly under the high rate of speed at which they are required to be run. This is particularly true where cylinders of considerable length and of small diameter are employed, and, in fact, as they have hitherto been constructed, it has been impossible to successfully manufacture cylinders of any considerable length on these machines. Another difficulty which has been experienced is this: The great pressure which the liquid pulp exerts on the under side of the cover or upper flange of the machine when ruiming at a high rate of speed has rendered it necessary to provide stay-rods running from end to end of the cylinder in order to keep this cover in place. There has also been experienced difiicultyin forming the pulp article of the required thickness at the top and bottom of the machine, since the contents of the cylinder has a constant tendency t0 settle, thus forming pulp at a greater thickness at the bottom than at the top. This difculty is of course more marked in cylinders of comparatively great lengths than in the shorter kinds. l

I remedy the defects above stated by placing my cylindrical former in a horizontal position and providing two or more bearings, which insure the even running of the cylinder, prevent oscillations, aud effect the uniform distribution of the pulp over the whole length of the cylinder. I am thus enabled to extend the length of my cylinder to any requirement, and by safely increasing the rate of speed I am enabled to form much smaller diameters than hy the use ofthe old process or machine. For the same reason I am able to form cylinders of greater thickness than was possible in the old machines, where less speed could be safely attained.

I illustrate my invention by the use of the accompanying drawings, in .which- VFigure lis a side elevation of a machine embodying my invention. Fig. 2 is a cross-scctiou through a: x of Fig. l.

R is the body of the machine.

C C are stationary bearings supporting the head of the lathe.

A is a driving-pulley, and I) is a hollow spindle having a pulp-induct, D.

B is the face-plate, permanently connected with the spindle D. The induct D' opens in the face of the face-plate B.

Eis a pipe through which thesupply ofpulp is drawn. e is a valve in same. This pipe is attached or bolted to the bearing C and connects with the pulp-induct D.

F is a perforated cylinder, made in two or more sections hinged together by hinges f, which are attached together by movable pins f. This cylinder F lits tightly within the ange b of the faceplate B and is secured therein by a screw or other suitable means. The cylinder F, which may be of any desiredlength or diameter, has at its opposite ends the back cover or head,.I,with a hollowjournal, I, opening into the cylinder. A movable bearing, G, supports thejournal I of the head or cover J.

S is a movable bearing having a semicircular strap, S,which passes over the top of the cylinder, the whole forming a circular bearing of the exact diameter of the cylinder F, within which said cylinder lies. The cylinder F has alining, L, composed of felt or other pervious material.

O represents the pulp cylinder after it has been formed.

Pis ahood or cover extending the entire IOO length of the machine, and is designed to con- Iine the water thrown off by the revolutions of the cylinder and discharge it through the bed of the machine.

The operation of my machine is as follows: The cylinder is rapidly revolved by belt running on pulley A. Pulp is forced in through the induct D', air being admitted through the hollow journal I at the opposite end of cylinder. The pulp will distribute itself evenly along the entire length of the cylinder, the water being thrown out through the perforations by the cylinder F, and the pulp deposited against the innersurface ofthe pervious lining L. Vhen the pulp has been formed and the water thrown off, the cylinder F is removed from the bearings S and the heads B and J, and it is then unhinged in the usual way and the pulpcylinder removed from the interior.

As many intermediate bearings as may be required may be placed between the two ends of the machine, according to the length of the cylinder. The necessary number may be determined by experience.

Vhere comparatively short cylinders are formed no intermediate bearing will be necessary.

It is evident that the details of the machine as herein illust-rated can be "ery considerably varied and still retain the essential features of my invention-namely, the horizontal former havingcentralpulpinletaud suitablebearings.

I claim-- 1. In a machine forforming articles of pulp, a pervious cylindrical former rotating horizontally, or nearly so, in suitable bearings, and a pulp-inlet opening centrally into one end of the same, whereby oscillations are prevented and the pulp evenly distributed over the entire length of the cylinder, substantially as described.

2. In a machine for forming cylindrical arlicles of pulp, a pervious cylindrical former having in one end a recessed head connected with a hollow spindle through which the pulp flows to the interior ofthe cylinder, bearings in which said spindle runs, a back head having a hollow journal, abearing to support same, and a drivingpulley, all combined substantially as described.

3. A machine for forming cylindrical articles of pulp, a pervious cylindrical former having at one endahead or cover connected with ahollow spindle through which the pulp Hows to theinterior ofthe cylinder, bearings in which said spindle runs, a back head at 4the opposite end of said cylinder having a hollow `journal, and means forsupportingsaidcylinderatintermediate points between the two ends, all conibined substantially as shown.

In testimony whereofI affix my signature in presence of two Witnesses.

WILLIAM P. STEVENS. Vitnesses:

S. W. Barns, WILBUR F. LUNT. 

